The Villain's Monologue

As long as this spell is on the stack, players
can't cast spells.
You may reveal a number of cards from
your hand. If you do, spells your opponents cost cast {x} more to cast until your next
turn, where X is the number of cards revealed this way. End the turn.
"...can defeat. And when I unleash it, I'll get-
You sly dog! You got me monologuing!"